Add ragel machine generators to SCONS

src/trusted/validator_ragel/unreviewed/decoder-x86_64.rl

Index: src/trusted/validator_ragel/unreviewed/decoder-x86_64.rl
===================================================================
--- src/trusted/validator_ragel/unreviewed/decoder-x86_64.rl	(revision 8170)
+++ src/trusted/validator_ragel/unreviewed/decoder-x86_64.rl	(working copy)
@@ -5,21 +5,21 @@
  */
 
 #include <assert.h>
-#include <elf.h>
-#include <inttypes.h>
 #include <stddef.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include "decoder.h"
 
+#include "native_client/src/include/elf32.h"
+#include "native_client/src/trusted/validator_ragel/unreviewed/decoder.h"
+
 #undef TRUE
 #define TRUE    1
 
 #undef FALSE
 #define FALSE   0
 
-#include "decoder-x86_64-instruction-consts.c"
+#include "native_client/src/trusted/validator_ragel/generated/decoder-x86_64-instruction-consts.c"
 
 %%{
   machine x86_64_decoder;